Bracket fastening means for textile drawing mechanisms



E. DAUSCH 2,314,838

BRACKET FASTENING MEANS FOR TEXTILE DRAWING MECHANISMS Dec. 3, 1957Filed NOV. 16, 1954 In van/0r in DQLLSQ A MM Ssh-Him.

United States Patent ()fiiice Patented Dec. 3, 1957 BRACKET FASTENINGMEANS FOR TEXTILE DRAWING NECHANISMS Erwin Dausch, Esslingen (Neckar),Germany, assignor to S. K. F. Kugellagerfabriken, G. m. b. H.,Schweinfurt. Germany Application November 16, 1954, Serial No. 469,225Claims priority, application Germany April 10, 1954 8 Claims. (Cl.19-134) The present invention relates to textile drawing mechanisms usedin spinning machines.

With such drawing mechanisms it is conventional to provide on astationary frame a bracket which turnably carries a top rolls carryingarm for movement to and from an operating machine. This bracket isconventionally fixed to a bar carried by the frame. The fixing of thebracket to the bar is usually brought about by providing the bracketwith a pair of springy free end portions passing about the bar and drawntogether by a screw or the like into clamping engagement with the bar.With this conventional feature it is exceedingly difficult if notimpossible to provide a good connection between the bracket and barbecause the springy free end portions of the bracket very seldom if everhave in engagement with the bar surfaces which correspond exactly to theshape of the bar so that clamping engagement between the bracket and thebar over the entire clamping surface of the free end portions of thebracket can be obtained under the best possible circumstances only ifthese free end portions are drawn toward each other with a tremendousforce, and the exertion of such a force is of course undesirable.

One of the objects of the present invention is to overcome the abovedrawbacks by providing a means on the bracket capable of clamping thebracket to the bar with an extremely large force after application of asmall fraction of this large force to this means.

Another object of the present invention is to provide a bracket of theabove type with a clamping means which fixes the bracket to the bar in amanner far superior to anything which has hitherto been possible.

A further object of the present invention is to provide a bracket and aclamping means of the above type both of which are of an exceedinglysimple and compact construction.

With the above objects in view the present invention mainly consists ofa textile drawing mechanism which includes a support means carrying abar. A bracket is formed with an opening through which the bar extends,and this bracket is adapted to carry a top rolls carrying arm of thedrawing mechanism. This bracket has a portion spaced from the bar andprovided with a surface directed toward the bar. A wedge member islocated in the space between the bracket portion and bar and engages thelatter and the surface of the bracket portion. A means engages thiswedge member for wedging the same into this space against the bar andthis surface of the bracket portion so as to fix the bracket to the bar.

The novel features which are considered as characteristic for theinvention are set forth in particular in the appended claims. Theinvention itself, however, both as to its construction and its method ofoperation, together with additional objects and advantages thereof, willbe best understood from the following description of specificembodiments when read in connection with the accompanying drawings, inwhich:

Fig. 1 is a fragmentary, diagrammatic side elevational view of a textiledrawing mechanism including the structure of the invention;

Fig. 2 is a fragmentary sectional view showing the details of theinvention on an enlarged scale as compared to Fig. 1, Fig. 2 being takenalong line 2-2 of Fig. 3 in the direction of the arrows; and

Fig. 3 is a sectional view taken along line 33 of Fig. 2 in thedirection of the arrows.

Referring now to Fig. 1, it will be seen that the textile drawingmechanism illustrated therein includes a frame A to which a bracket B isfixed. A top rolls carrier C is turnably carried by the bracket B formovement from the operating position shown in Fig. 1 in a clockwisedirection upwardly to an inoperative position. Blocks 243 which turnablycarry the bottom rolls 41, respectively, are shiftable along the frame Ain a known way to adjust the position of the bottom rolls. The top rollscarrier C has arms 23 connected thereto, and these arms 23 turnablycarry the top rolls 22, respectively, which engage the bottom rolls 41,respectively, these top rolls also being adjustable in a known way so asto properly engage the bottom rolls, respecttively. Also, Fig. 1diagrammatically shows clearer rolls 39 respectively in engagement withthe top rolls 22. A releasable lock member 14 and a rivet 35 are alsovisible in Fig. 1 and are referred to in greater detail below.

The details of the structure of the invention are shown in Figs. 2 and 3which show the bracket B and the parts of the drawing mechanismassociated therewith. This bracket B is, made out of a springy sheetmetal bent in a press or the like to the shape shown in Figs. 2 and 3.The bracket B includes a pair of side walls 24 and 25 which are spacedfrom each other and interconnected by a rear wall 26 of the bracket. Thebracket is formed between the side walls 24 and 25 with a lower cutout27 and an upper cutout 28, as shown in Figs. 2 and 3, so that the sidewalls 24 and 25 are interconnected only by the rear wall 26, and in thisway the side walls 24 and 25 are resiliently movable toward and awayfrom each other. The rear wall 26 is formed with an opening 29 for apurpose described below.

Each of the side walls 24 and 25 is provided with an inwardly pressedportion having a surface directed toward the bar 10. This bar 10 isfixed to the frame A. Thus, as is particularly evident from Fig. 3, theside wall 24 is provided with an inwardly struck portion 32 bent at 38inwardly from the side wall 24, and the side wall 25 is provided with aninwardly struck portion 33 bent at 31 inwardly from the side wall 25.These inwardly struck portions 32 and 33 are cut from material of theside walls 24 and 25, respectively, and are respectively provided withsurfaces directed toward and spaced from the bar 10, these surfacesbeing located at the free edges of the inwardly struck portions 32 and33, respectively. As is apparent from Fig. 3, the portions 32 and 33make the same acute angle with the remainder of the side walls 24 and25, respectively, and the free edges of the portions 32 and 33 areparallel to each other and located opposite each other. The side walls24 and 25 are re spectively formed with aligned openings ofsubstantially the same diameter as bar 10 and through which the bar itextends.

A pair of wedge members 16 and 17 are located within the bracket Bbetween the side walls 24 and 25 thereof, and, as is evident from 'Fig.3 where the front end face of wedge member 17 is visible, these wedgemembers have .a width substantially equal to the distance between sidewalls 24 and 25. The wedge member 16 is provided with a bottom inclinedsurface portion 161 engaging bar 10 and the wedge member 17 is providedwith a bottom inclined surface portion 171 engaging the bar 10, and asis evident from Figs. 2 and 3, these wedge members are located in thespace between bar and portions 32 and 33 and engage the bar 10 .and thesurfaces of portions 32 and 33 which are directed toward the bar 10. Thewedge member 17 is formed in its top face directed toward the inwardlystruck portions 32 and 33 with a channel having opposed side faces ofthe same inclination as and respectively engaging the outer side facesof the inwardly truck portions 32 and 33, so that the wedge member 17 isprovided along its length with an upper rib 172 located between inwardlystruck portion 32 and the remainder of side wall 24 and with an upperrib 173 located between inwardly struck portion 33 and side wall 25. Inthe same way, the wedge member 16 is formed in its top face with achannel having opposed side faces of the same inclination as andengaging the outer side surfaces of the inwardly struck portions 32 and33, so that wedge member 16 has along one of its upper side edges a rib162 located between inwardly struck portion 32 and the remainder of sidewall 2 1, as shown in Fig. 2, and along its upper side edge opposite rib162 with a second rib not visible in the drawings located between theinwardly struck portion 33 and side wall 25 in alignment with the rib173 of the wedge member 17. As is evident from Fig. 2, the inwardlystruck portions 32 and 33 are substantially longer than the total lengthof the wedge members 16 and 17 which engage these inwardly struckportions.

The wedge member 17 is formed with a bore passing therethrough and thewedge member 16 is formed with a bore aligned with the bore of wedgemember 17 and being coaxial therewith. A screw 18 extends freely throughthe bore of wedge member 17 into threaded engagement with the bore ofwedge member 16, and the head of screw 18 bears against the right endface of wedge member 17, as shown in Fig. 2. The head of screw 18 is inalignment with opening 29 and is formed at its right end face, as viewedin Fig. 2, with a non-circular recess adapted to receive a key wrenchpassing through opening 29 into engagement with the screw member 18 forturning the latter. Thus, by turning the screw 18 the wedge members 16and 17 are drawn toward each other into the space between bar 10 andportions 32 and 33 into wedging engagement with the latter and bar 10 soas to fix the bracket to the bar 10 in this manner. When the bracket isfixed in this manner to the bar 10 the force of the wedge membersagainst the inwardly struck portions 32 and 33 is transferred throughthe latter to the bracket so as to press the latter against the bar 10.The inclined surfaces 161 and 171 of wedge members 16 and 17,respectively, enable these wedge members to be pressed against the bar10 with -a force several times as great as the force applied by theoperator to the screw 18, and the designer is free to fix therelationship between these vforces by choosing the particularinclination of the surfaces 161 and 171.

The top rolls carrier C is in the form of a channel member 13 made ofsheet metal and open along its bottom. The side walls of the channelmember 13 are provided at their rear end portions with outwardly pressedparts 131, respectively, and the upper portions of the side walls 24 and25 are accommodated between these portions 131 of channel member 13. Thepivot pin 12 extends through aligned openings in side walls 24 and 25,respectively, and through aligned openings in the portions 131 of member13, respectively, so that in this way the top rolls carrier C issupported for turning movement on the bracket B. Pins 34 respectivelyextend through transverse bores formed in the pivot pin 12 (Fig. 3), andthese pins respectively engage the outer faces of portions 131 of member13 so as to prevent axial displacement of pivot pin 12.

As is well known, springs mounted on top rolls car rier C urge the toprolls 22 downwardly into engagement with the bottom rolls 41,respectively, and these springs tend to turn the top rolls carrier Cupwardly from the operating position shown in Fig. 1. In order toprevent such turning of the top rolls carrier C, a lock 14 is provided.This lock 14 extends about the channel member 13 and is provided with abottom cross piece 141 engaging the forward projections 111 of sidewalls 24 and 25, respectively, so that in this Way the lock 14 preventsupward turning of the top rolls carrier. The top wall of channel member13 is provided with an upwardly extending, part cylindrical projectionextending into a mating recess formed in the underside of the topportion of lock 14 so that in this way the lock 14 is turnable on thechannel member 13. Thus in order to release the top rolls carrying arm Cfor turning movement to an inoperative position, it is only necessary toturn the lock 14 in a clockwise direction, as viewed in Fig. 2, so as tomove cross piece 141 out of engagement with projections 111. The lock 14is provided with a downwardly extending projection 142 passing withsubstantial clearance through an opening in the top wall of channelmember 13, and this projection 142 is itself formed with an openingthrough which a wavy leaf spring 15 extends, as shown in Fig. 2, thisleaf spring engaging the underside of the top wall of channel member 13and projection 142 to resiliently urge the lock 14 to its lockingposition shown in Fig. 2.

A rivet 35 fixes to the underside of the top wall of channel member 13,adjacent its rear end, a leaf spring 36 having a curved free end portion37 which enters into a recess 38 formed in the outer rear face of rearwall 26 of bracket B when arm C is turned upwardly to its inoperativeposition, so that in this way the leaf spring 36 cooperates with bracketB to releasably retain the arm C in its upper inoperative position.

It will be understood that each of the elements described above, or twoor more together, may also find a useful application in other types oftextile drawing mechanisms differing from the types described above.

While the invention has been illustrated and described as embodied inbrackets for textile drawing mechanisms, it is not intended to belimited to the details shown, since various modifications and structuralchanges may be made without departing in any way from the spirit of thepresent invention.

Without further analysis, the foregoing will so fully reveal the gist ofthe present invention that others can by applying current knowledgereadily adapt it for various applications without omitting featuresthat, from the standpoint of prior art, fairly constitute essentialcharac teristics of the generic or specific aspects of this inventionand, therefore, Such adaptations should and are intended to becomprehended within the meaning and range of equivalence of thefollowing claims.

What is claimed as new and desired to be secured by Letters Patent is:

1. In a textile drawing mechanism, in combination, support means; a barcarried by said support means; a bracket adapted to carry a top rollscarrying arm of the drawing mechanism, said bracket having a pair ofspaced side walls respectively formed with aligned openings throughwhich said bar extends and each of said side walls having an inwardlyextending portion spaced from said bar and having a surface directedtoward the same, said portions of said side walls being located oppositeeach other; a wedge member located in the space between said bracketportions and bar and engaging the latter and said surfaces of saidbracket portions; and means engaging said wedge member for moving thesame into wedging engagement with said bar and bracket portions forfixing said bracket to said bar.

2. In a textile drawing mechanism, in combination, support means; a barcarried by said support means; a bracket adapted to carry a top rollscarrying arm of the drawing mechanism, said bracket having a pair ofspaced side walls respectively formed with aligned openings throughwhich said bar extends and each of said side walls having an inwardlyextending portion cut from the remainder of said bracket and having afree edge directed toward and spaced from said bar, said inwardlyextending portions of said side walls being located opposite each other;a wedge member located in the space between said bracket portions andbar and engaging the latter and said edges of said inwardly extendingbracket portions; and means engaging said wedge member for moving thesame into wedging engagement with said bar and bracket portions forfixing said bracket to said bar.

3. In a textile drawing mechanism, in combination, support means; a barcarried by said support means; a bracket adapted to carry a top rollscarrying arm of the drawing mechanism, said bracket having a pair ofspaced side walls respectively formed with aligned openings throughwhich said bar extends and each of said side walls having an inwardlyextending portion cut from the remainder of said bracket and having afree edge directed toward and spaced from said bar, said inwardlyextending portions of said side walls being located opposite each other;a pair or" wedge members spaced from each other, located in the spacebetween said bracket portion and bar, and engaging the latter and saidedges of said inwardly extending bracket portions; and means engagingsaid wedge members for drawing the same toward each other into wedgingengagement with said bar and bracket portions for fixing said bracket tosaid bar.

4. In a textile drawing mechanism, in combination, support means; a barcarried by said support means; a sheet metal bracket adapted to carry atop rolls carrying arm of the support means, said bracket having a pairof spaced side Walls respectively formed with aligned openings throughwhich said bar extends and each of said side walls having an inwardlyextending portion cut from said bracket side wall, making an acute angletherewith, and having a free edge directed toward and spaced from saidbar, said inwardly extending portions of said side walls being locatedopposite each other; a wedge member located in the space between saidbracket portions and bar and engaging the latter, said wedge memberhaving a face directed toward said bracket portions and formed with achannel into which said bracket portions extend with outer side surfacesof said bracket portions respectively engaging side surfaces of saidchannel; and means engaging said wedge member for moving the same intowedging engagement with said bar and bracket portions for fixing saidbracket to said bar.

5. In a textile drawing mechanism, in combination, support means; a barcarried by said support means; a bracket adapted to carry a top rollscarrying arm of the drawing mechanism, said bracket having a pair ofspaced side walls respectively formed with aligned openings throughwhich said bar extends and each of said side Walls having an inwardlyextending portion spaced from said bar and having a free edge directedtoward the same, said portions of said side walls being located oppositeeach other; a pair of wedge members spaced from each other, located inthe space between said bracket portion and bar, and engaging the latterand said edges of said inwardly extending bracket portions; and meansengaging said wedge members for drawing the same toward each other intowedging engagement with said bar and bracket portions for fixing saidbracket to said bar.

6. In a textile drawing mechanism, in combination, support means; a barcarried by said support means; a sheet metal bracket adapted to carry atop rolls carrying arm of the support means, said bracket having a pairof spaced side walls respectively formed with aligned openings throughwhich said bar extends and each of said side walls having an inwardlyextending portion cut from said bracket side Wall, making an acute angletherewith, and having a free edge directed toward and spaced from saidbar, said inwardly extending portions of said side walls being locatedopposite each other and respectively making the same angles with saidside walls; a wedge member located in the space between said bracketportions and bar and engaging the latter, said wedge member having aface directed toward said bracket portions and formed with a channelinto which said bracket portions extend, said channel having sidesurfaces of the same inclination as said bracket portions, respectively,engaging the outer surfaces of said bracket portions, respectively; andmeans engaging said Wedge member for moving the same into wedgingengagement with said bar and bracket portions for fixing said bracket tosaid bar.

7. In a textile drawing mechanism, in combination, support means; a barcarried by said support means; a sheet metal bracket adapted to carry atop rolls carrying arm of the support means, said bracket having a pairof spaced side walls respectively formed with aligned openings throughwhich said bar extends and each of said side Walls having an inwardlyextending portion cut from said bracket side wall, making an acute angletherewith, and having a free edge directed toward and spaced from saidbar, said inwardly extending portions of said side walls being locatedopposite each other and respectively making the same angles with saidside walls; a pair of wedge members located in the space between saidbracket portions and bar and engaging the latter, said wedge membersbeing spaced from each other and respectively having faces directedtoward said bracket portions and formed with channels, respectively,into which said bracket portions extend, said channels each having sidesurfaces of the same inclination as said bracket portions, respectively,engaging the outer surfaces thereof, respectively; and means engagingsaid wedge members for drawing the same toward each other into wedgingengagement with said bar and bracket portions for fixing said bracket tosaid bar.

8. In a textile drawing mechanism, in combination, support means; a barcarried by said support means; a bracket adapted to carry a top rollscarrying arm of the drawing mechanism, said bracket having a pair ofspaced side walls respectively formed with aligned openings throughwhich said bar extends and a rear wall interconnecting said side wallsand also formed with an opening, each of said side walls having aninwardly extending portion spaced from said bar and having a surfacedirected towards the same, said inwardly extending portions of said sidewalls being located opposite each other; a pair of wedge membersrespectively located in the space between said side walls between saidbar and said inwardly extending portions of said side walls and engagingsaid inwardly extending portions of said side walls and said bar, saidwedge members being spaced from each other and respectively formed withcoaxial bores passing therethrough, the bore of that wedge member whichis most distant from said rear wall of said bracket having its borethreaded; and a screw member extending freely through the other of saidbores into threaded engagement with said threaded bore for drawing saidwedge members toward each other into wedging engagement with said 'barand said inwardly extending portions of said bracket side walls so as tofix said bracket to said bar, said screw member having a head endaccessible through said opening in said rear wall of said bracket andsaid wedge members and screw member being located in their entiretybetween said side walls of said bracket so that the entire structure forfixing said bracket to said bar does not extend outwardly beyond saidbracket.

References Cited in the file of this patent UNITED STATES PATENTS1,205,733 Gutenkunst NOV. 21, 1916 1,326,601 Ledwinka Dec. 30, 19191,570,323 Taylor Jan. 19, 1926 2,662,249 Neu Dec. 15, 1953 2,691,772Hixon Oct. 12, 1954 FOREIGN PATENTS 6,432 Great Britain of 1893 505,388Belgium Sept. 15, 1951

